Techniques for expediting electrified vehicle propulsion functionalities using a multi-core supervisory controller

Abstract

An expedited start-up procedure of an electrified vehicle involves a hybrid control processor (HCP) connected to a controller area network (CAN) having electrified powertrain (ePT) modules and an auxiliary HCP (AHCP) connected to the CAN and connected to the HCP via a hardwire wakeup line. In response to a start-up request, the HCP initializes the start-up procedure in which it sends a wakeup signal to the AHCP via the hardwire wakeup line, performs shutoff path testing via a first CAN bus, and confirms enabled ePT modules communication via a second CAN bus to complete the start-up procedure. In response to the wakeup signal from the HCP, the AHCP initializes and then participates in the start-up procedure in which it wakes up and enables communication by the plurality of ePT modules via the second CAN bus. A duration of the start-up procedure is less than a customer annoyance threshold.

What is claimed is: 
     
       1. A control system for performing an expedited start-up procedure of an electrified vehicle, the control system comprising:
 a hybrid control processor (HCP) connected to a controller area network (CAN) having a plurality of electrified powertrain (ePT) ECUs/modules; and 
 an auxiliary hybrid control processor (AHCP) connected to the CAN and connected to the HCP via a hardwire wakeup line; 
 wherein in response to a start-up request for the electrified vehicle, the HCP is configured to initialize a start-up procedure in which the HCP:
 sends a wakeup signal to the AHCP via the hardwire wakeup line, 
 performs shutoff path testing via a first CAN bus, and 
 confirms communication with the plurality of ePT ECUs/modules via a second CAN bus to complete the start-up procedure; and 
 
 wherein in response to the wakeup signal from the HCP, the AHCP is configured to initialize and then participate in the start-up procedure in which the AHCP wakes up and enables communication by the plurality of ePT ECUs/modules via the second CAN bus, and 
 wherein a duration of the start-up procedure is less than a predetermined customer annoyance threshold. 
 
     
     
       2. The control system of  claim 1 , wherein the customer annoyance threshold is two seconds. 
     
     
       3. The control system of  claim 2 , wherein the duration of the start-up procedure is in a range of approximately 1760-1830 milliseconds. 
     
     
       4. The control system of  claim 1 , wherein the HCP does not perform a reset line test. 
     
     
       5. The control system of  claim 1 , wherein the AHCP and the HCP are configured in a secondary/primary relationship, and wherein the AHCP does not perform shutoff path testing. 
     
     
       6. The control system of  claim 1 , wherein the HCP and the AHCP are implemented by separate cores of a multi-core processor. 
     
     
       7. The control system of  claim 1 , wherein the HCP performs the shutoff path testing in parallel while the AHCP wakes up and enables communication by the plurality of ePT ECUs/modules via the second CAN bus. 
     
     
       8. The control system of  claim 1 , wherein the AHCP is configured to send a first set of network management messages at an enhanced cycle rate to wakeup and enable communication by the plurality of ePT ECUs/modules via the second CAN bus, and wherein the enhanced cycle rate is faster than a normal cycle rate. 
     
     
       9. The control system of  claim 8 , wherein the first set of network management messages is a first ten messages, the enhanced cycle rate is approximately 100 milliseconds, and the normal cycle rate is approximately 1000 milliseconds. 
     
     
       10. A control method for an expedited start-up procedure for an electrified vehicle, the control method comprising:
 providing a hybrid control processor (HCP) connected to a controller area network (CAN) having a plurality of electrified powertrain (ePT) ECUs/modules; 
 providing an auxiliary hybrid control processor (AHCP) connected to the CAN and connected to the HCP via a hardwire wakeup line; 
 detecting, by the HCP, a startup request for the electrified vehicle and, in response thereto, initializing, by the HCP, a start-up procedure in which the HCP:
 sends a wakeup signal to the AHCP via the hardwire wakeup line, 
 performs shutoff path testing via a first CAN bus, and 
 confirms communication with the plurality of ePT ECUs/modules via a second CAN bus to complete the start-up procedure; and 
 
 receiving, by the AHCP, the wakeup signal from the HCP and, in response thereto, initializing, by the AHCP, and then participating, by the AHCP, in the start-up procedure in which the AHCP wakes up and enables communication by the plurality of ePT ECUs/modules via the second CAN bus, 
 wherein a duration of the start-up procedure is less than a predetermined customer annoyance threshold. 
 
     
     
       11. The control method of  claim 10 , wherein the customer annoyance threshold is two seconds. 
     
     
       12. The control method of  claim 11 , wherein the duration of the start-up procedure is in a range of approximately 1760-1830 milliseconds. 
     
     
       13. The control method of  claim 10 , wherein the HCP does not perform a reset line test. 
     
     
       14. The control method of  claim 10 , wherein the AHCP and the HCP are configured in a secondary/primary relationship, and wherein the AHCP does not perform shutoff path testing. 
     
     
       15. The control method of  claim 10 , wherein the HCP and the AHCP are implemented by separate cores of a multi-core processor. 
     
     
       16. The control method of  claim 10 , wherein the HCP performs the shutoff path testing in parallel while the AHCP wakes up and enables communication by the plurality of ePT ECUs/modules via the second CAN bus. 
     
     
       17. The control method of  claim 10 , wherein the AHCP is configured to send a first set of network management messages at an enhanced cycle rate to wakeup and enable communication by the plurality of ePT ECUs/modules via the second CAN bus, and wherein the enhanced cycle rate is faster than a normal cycle rate. 
     
     
       18. The control method of  claim 17 , wherein the first set of network management messages is a first ten messages, the enhanced cycle rate is approximately 100 milliseconds, and the normal cycle rate is approximately 1000 milliseconds.